| 摘要 |
PURPOSE:To buffer collision with the main body of a cabinet by using braking force when the speed at the time of housing is too high by providing a non- rotary braking member equipped with a circular inner face to be frictionally touched with a braking pad which is rotated with a rotary wheel and displaced outside a radial direction with centrifugal force. CONSTITUTION:An overspeed braking roller A is provided with a braking pad 2 to be rotated together with a rotary wheel 1 and displaced outside the radial direction with the centrifugal force and a nonrotary braking member 4 equipped with a circular inner face 3 to frictionally touch the braking pad 2. A pair of braking pads 2 and 2 are interlocked through elastic bodies 8 and 8 to a ring-shaped holding member 7. When the braking pads 2 and 2 so operated on a drawer touches frictionally the circular inner face 3 of the braking member 4, frictional force, namely, braking force is operated by centrifugal force in proportion to the square of angular velocity. On the other hand, while the moving speed of the drawer is settled within a certain range from '0' to a fixed value, no bracking is operated. |
